diff --git a/compiler/cmd/llgo/llgo.go b/compiler/cmd/llgo/llgo.go
index 4d1105ae..5ac3b026 100644
--- a/compiler/cmd/llgo/llgo.go
+++ b/compiler/cmd/llgo/llgo.go
@@ -56,6 +56,7 @@ func main() {
 	args := flag.Args()
 	if len(args) < 1 {
 		flag.Usage()
+		return
 	}
 	log.SetFlags(log.Ldefault &^ log.LstdFlags)